CN104728162B - Cross-flow fan blade - Google Patents
Cross-flow fan blade Download PDFInfo
- Publication number
- CN104728162B CN104728162B CN201310724032.1A CN201310724032A CN104728162B CN 104728162 B CN104728162 B CN 104728162B CN 201310724032 A CN201310724032 A CN 201310724032A CN 104728162 B CN104728162 B CN 104728162B
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- Prior art keywords
- flow fan
- fan blade
- blade
- circle
- thickness
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- 230000008859 change Effects 0.000 abstract description 14
- 238000000926 separation method Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 3
- 230000007306 turnover Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 208000004141 microcephaly Diseases 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/20—Rotors
- F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05D2240/301—Cross-sectional characteristics
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a cross-flow fan blade. According to the cross-flow fan blade, the diameter of the outer circle of the cross-flow fan blade is D2, and the chord length of the cross-flow fan blade is L; taking the rotating axis of the cross-flow fan blade as the center of a circle, and taking the intersection point of the rotating axis of the cross-flow fan blade and the blade with the largest thickness of the cross-flow fan blade as a circle with the radius as a first circle; the diameter of a first circle of the cross-flow fan blade is D1, and D1/D2 is more than or equal to 0.9 and less than or equal to 0.98; the thickness of the joint of the first circle segment and the blade of the cross-flow fan blade is d1, and the chord length L, d1/L of the first circle segment and the blade is more than 0.086. The position of the thickest part of the blade thickness and the thickest thickness change are adjusted by improving the thickness distribution condition of the blade, so that the airflow separation state of the air inlet area of the through-flow fan blade is improved, the loss is reduced, and the noise is reduced.
Description
Technical field
The present invention relates to through-flow fan blade field, especially, is related to a kind of through-flow fan blade.
Background technology
Through-flow fan blade（Either axial-flow fan or tubular wine wheel）It is widely used in air conditioner wall-mounted formula split on machine, its work
Include as feature：When impeller makees stable rotary motion, gas has the flowing for passing in and out leaf grating twice.Gas enters for the first time
Relative velocity when going out leaf grating be making retarded motion, relative velocity during second turnover leaf grating be accelerating, and
The absolute velocity of gas is the process for being in acceleration in whole motor process, here it is knot of the rotating cascade to air work
Really, air current flow track is as shown in Figure 1.For the first time turnover leaf grating is referred to as air intake region, and second turnover leaf grating is referred to as
Wind region, then leaf grating can be divided into air intake leaf grating and air-out leaf grating according to zone similarity.
Traditional through-flow fan blade blade design basic ideas：According to fluid-dynamic design principle, it is generally at airflow inlet
Microcephaly, thickness gradually increases with air-flow into leaf grating；And as air-flow flows out leaf grating, then in view of the loss of blade wake passing,
Therefore vane thickness is gradually reduced again, and overall blade is designed as air foil shape.Air inlet side and outlet are in view of blade two
Side, the vane thickness of existing tangential impeller is small in ends, broad in the middle, the parabolic curve design that seamlessly transits, and the center line of blade
（The line of blade section mid-depth）Essentially single circular arc line is constituted.As shown in Figure 2, thickness change is shown in Fig. 4 to its blade construction
Shown, blade center line circular arc is as shown in Figure 3.
Blade is passed twice through in view of tangential impeller air-flow, one is to enter inside through-flow fan blade through blade from periphery,
It two is to flow out through blade from through-flow fan blade inside, i.e., blade two ends are not only again outlet side for inlet end, as shown in Figure 1.From
Traditional design thinking is set out, and existing vane thickness is designed to reach and avoids the detached effect of air-flow.But practical situation is not such as
This, from the point of view of the situation that tangential impeller applies in air-conditioned wind tunnel, the subregional blade back in inlet section occurs in that serious
Air-flow is separated, as shown in Figure 5；And the subregional blade charge air flow angle in outlet section is excessive, as shown in Figure 6.Two kinds of design disadvantages
End can cause large energy loss, produce aerodynamic noise.
The content of the invention
Present invention aim at providing a kind of through-flow fan blade, there is serious gas to solve the subregional blade back in inlet section
The technical problem of flow separation.
For achieving the above object, the invention provides a kind of through-flow fan blade, the outside diameter of through-flow fan blade is D2, through-flow wind
The chord length of the blade of leaf is L；Friendship of the center of rotation with through-flow fan blade as the center of circle, with the thickness maximum of the blade of through-flow fan blade
Point is first section of circle for the circle of radius；First section of circular diameter of through-flow fan blade be D1,0.9≤D1/D2≤0.98；First section of circle with
The junction thickness of the blade of through-flow fan blade is d1, chord length L of first section of circle and blade, d1/L>0.086.
Further, a diameter of D4 of the inner circle of through-flow fan blade, the center of rotation with through-flow fan blade as the center of circle, through-flow fan blade
The center line of blade includes two sections of circular arcs, the circle with the intersection point of the intersection of two sections of circular arcs to the center of rotation of through-flow fan blade as radius
For second section of circle；Second section of circular diameter of through-flow fan blade be D3,1.05≤D3/D4≤1.15.
Further, the chord length of the blade of through-flow fan blade is L；Inner circle summit is to two sections of circular arcs on the blade of through-flow fan blade
The length of intersection be L2,0.1≤L2/L≤0.4.
The present invention also provides a kind of through-flow fan blade, and the chord length of the blade of through-flow fan blade is L；It is cylindrical on the blade of through-flow fan blade
Length at summit to the maximum gauge of the blade of through-flow fan blade be L1,0.1≤L1/L≤0.4；The blade distance of through-flow fan blade
Thickness is d1, d1/L at cylindrical summit L1 length>0.086.
Further, a diameter of D4 of the inner circle of through-flow fan blade, second section of circular diameter of through-flow fan blade is D3, second section of circle with
The junction of the blade of through-flow fan blade is the intersection of two sections of circular arcs, 1.05≤D3/D4≤1.15.
Further, the chord length of the blade of through-flow fan blade is L；Inner circle summit is to two sections of circular arcs on the blade of through-flow fan blade
The length of intersection be L2,0.1≤L2/L≤0.4.
The invention has the advantages that：
By improving vane thickness distribution situation, adjust vane thickness thickness position and most thick thickness change so as to
The air-flow released state in through-flow fan blade air intake region is improved, loss is reduced, noise is reduced.
In addition to objects, features and advantages described above, the present invention also has other objects, features and advantages.
Below with reference to figure, the present invention is further detailed explanation.
Description of the drawings
The accompanying drawing for constituting the part of the application is used for providing a further understanding of the present invention, the schematic reality of the present invention
Apply example and its illustrate, for explaining the present invention, not constituting inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is air-flow flow trace schematic diagram when prior art through-flow fan blade works；
Fig. 2A is prior art through-flow fan blade vane type line structural representation；
Fig. 2 B are enlarged diagrams at the A of Fig. 2A；
Fig. 3 is prior art through-flow fan blade blade center line（The line of blade section mid-depth）It is made up of single hop circular arc
Schematic diagram；
Fig. 4 is that prior art through-flow fan blade vane thickness changes contrast schematic diagram with through-flow fan blade vane thickness of the present invention；
Fig. 5 A are that prior art through-flow fan blade air intake regional gas stream separates schematic diagram；
Fig. 5 B are enlarged diagrams at the B of Fig. 5 A；
Fig. 6 A are that prior art through-flow fan blade air-out regional gas stream is separated. schematic diagram；
Fig. 6 B are enlarged diagrams at the C of Fig. 6 A；
Fig. 7 A are through-flow fan blade vane type line structural representations of the invention；
Fig. 7 B are the enlarged diagrams at the D of Fig. 7 A；
Fig. 8 is through-flow fan blade blade center line of the invention（The line of blade section mid-depth）By two sections of circular arc structures
Into schematic diagram；
Fig. 9 is through-flow fan blade maximum blade thickness position of the invention and two sections of circular arc junction position views；
Figure 10 A are through-flow fan blade maximum blade thickness position of the present invention of the invention and two sections of circular arc junctions position
Schematic diagram；
Figure 10 B are the enlarged diagrams at the E of Figure 10 A；And
Figure 11 is that through-flow fan blade maximum blade thickness position thickness of the invention is contrasted with existing leaf blade thickness
Schematic diagram.
Specific embodiment
Embodiments of the invention are described in detail below in conjunction with accompanying drawing, but the present invention can be defined by the claims
Implement with the multitude of different ways for covering.
Referring to Fig. 4, Fig. 7 to Figure 11, a kind of through-flow fan blade of the invention, the chord length of the blade of through-flow fan blade is L；With
The center of rotation of through-flow fan blade is the center of circle, and the intersection point with the thickness maximum of the blade of through-flow fan blade is first section for the circle of radius
Circle；The outside diameter of through-flow fan blade is D2, and first section of circular diameter of through-flow fan blade is D1,0.9≤D1/D2≤0.98；First section
Circle is maximum with the junction thickness of the blade of through-flow fan blade；First section of circle is d1 with the junction thickness of the blade of through-flow fan blade,
Chord length L of first section of circle and blade, d1/L>0.086.First section of circular diameter of maximum gauge position is D1, and two sections of circular arcs
Second section of junction position circular diameter is D3, and D2 is the maximum circumscribed diameter that fan blade center of rotation is the center of circle, and D4 is fan blade
Center of rotation is the minimum inscribe diameter of a circle in the center of circle；D1 represents through-flow fan blade maximum blade thickness position thickness of the present invention, d2
Represent the thickness that first section of circular diameter is existing leaf blade at D1 positions, and thickness at the maximum gauge of non-existing blade.It is logical
Cross improvement vane thickness distribution situation, adjust vane thickness thickness position and most thick thickness change so as to improve through-flow
The air-flow released state in fan blade air intake region, reduces loss, reduces noise.
In order to avoid serious flow separation phenomenon occurs in the subregional blade back in inlet section, the present invention is by blade near outer
Round vicinity is designed as vane thickness thickness, the position of relative rotation center as shown in Figure 9, the position of relative vane chord length
As shown in Figure 10.Vane thickness change not simple parabola, but be shown to be original thickness change it is parabolical on the basis of it is close
Increase a hump change curve at cylindrical D2 adnexaes, represent that thickness change has suddenly thickening in Fig. 4 abscissas [6,11] interval.
Thickness at maximum gauge changes into d1 by original d2, and the thickness of remaining position is taken and smoothly transitted.Improve rear blade blade profile
Design as shown in Figure 7, and vane thickness change curve is contrasted as shown in Figure 4, thickness change is contrasted as shown in Figure 11.
Referring to Fig. 3, Fig. 8 to Figure 10, a diameter of D4 of inner circle of through-flow fan blade, the center of rotation with through-flow fan blade as the center of circle,
The center line of the blade of through-flow fan blade includes two sections of circular arcs, with the center of rotation of the intersection point of the intersection of two sections of circular arcs to through-flow fan blade
Circle for radius is second section of circle；Second section of circular diameter of through-flow fan blade be D3,1.05≤D3/D4≤1.15.It is existing referring to Fig. 3
There is leaf blade center line only simple one section of circular arc, center line is on cylindrical；Referring to Fig. 8, the blade centreline of the present invention is by two sections
Circular arc is constituted；Center line has bending in the position that two sections of circular arcs cross, joint near D4, two sections of arc radius or parameter
Can be any, without specific formulation；Wherein two sections circular arcs are tangent, and now bent curvature of a curve there occurs change, for circular arc half
Footpath or curvature of curve do not have specific requirement, but for the position of transition point has 1.05≤D3/D4≤1.15 to require.Near inner circle
One section of circular arc mainly due to solve air-outlet part air-flow separation problem, arc radius size is carried out according to air-flow direction of flow
Design, bends equivalent to inner circle in Fig. 8 with cylindrical intersection.
The chord length of the blade of through-flow fan blade is L；Inner circle summit is to the intersection of two sections of circular arcs on the blade of through-flow fan blade
Length is L2,0.1≤L2/L≤0.4.In order to avoid the subregional blade charge air flow angle in outlet section is excessive, gas shock and
Segregation phenomenon, the present invention is designed as blade at two sections of circular sliding slopes near the vicinity of inner circle, the position of relative rotation center
As shown in Figure 9, the position of relative vane chord length is as shown in Figure 10.Improve two sections of designed arc-shaped appearances of rear blade as shown in Figure 8.
Through-flow fan blade of the invention, the chord length of the blade of through-flow fan blade is L；Cylindrical summit on the blade of through-flow fan blade
Length at the maximum gauge of the blade of through-flow fan blade be L1,0.1≤L1/L≤0.4；The blade of through-flow fan blade is apart from cylindrical
Thickness is d1, d1/L at the L1 length of summit>0.086.
The present invention is D1/D2=0.90～0.98 or L1/L=0.10 for the position span in vane thickness thickness
～0.40, its thickness change span is d1/d2=1.05～2；For position span is D3/ at two sections of circular sliding slopes
D4=1.05～1.15 or L2/L=0.10～0.40.Wherein D2 is the maximum circumcircle that fan blade center of rotation is the center of circle（Generally
It is referred to as cylindrical）Diameter, D4 be fan blade center of rotation for the center of circle minimum inscribed circle（Inner circle commonly referred to as）Diameter, L is wind
Two end points line ultimate ranges of leaf blade（Referred to as " chord length "）.
This patent case study on implementation, applies on machine in certain wall hanging split-type air conditioner, and test data is shown in Table 1.
| Scheme | Air quantity m3/h | Noise dB (A) | Power W |
| Prior art fan blade | 395 | 41.5 | 32.4 |
| The fan blade of this programme | 397 | 40.2 | 30.1 |
Fan blade using the application with compare than existing fan blade, on the basis of air quantity is constant, noise reduce 1dB, power
Reduce 2W（7.1%）.
As can be seen from the above description, the above embodiments of the present invention realize following technique effect：
By improving vane thickness distribution situation, adjust vane thickness thickness position and most thick thickness change so as to
The air-flow released state in through-flow fan blade air intake region is improved, loss is reduced, noise is reduced；By improving blade center line（Blade
The line at section thickness center）Situation, implements two sections of circular arcs of blade center line and constitutes, and adjusts two sections of circular sliding slopes positions so as to improve
The gas shock state in through-flow fan blade air-out region, reduces loss, reduces noise.
The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (6)
1. a kind of through-flow fan blade, it is characterised in that
The outside diameter of the through-flow fan blade is D2, and the chord length of the blade of the through-flow fan blade is L；
Center of rotation with the through-flow fan blade, as the center of circle, is half with the intersection point of the thickness maximum of the blade of the through-flow fan blade
The circle in footpath is first section of circle；First section of circular diameter of the through-flow fan blade be D1,0.9≤D1/D2≤0.98；
The junction thickness of first section of circle and the blade of the through-flow fan blade is d1, the chord length of the blade of the through-flow fan blade
L, d1/L>0.086.
2. through-flow fan blade according to claim 1, it is characterised in that
The a diameter of D4 of inner circle of the through-flow fan blade,
As the center of circle, the center line of the blade of the through-flow fan blade includes two sections of circular arcs to center of rotation with the through-flow fan blade, with institute
The center of rotation for stating intersection point to the through-flow fan blade of the intersection of two sections of circular arcs is second section of circle for the circle of radius；
Second section of circular diameter of the through-flow fan blade be D3,1.05≤D3/D4≤1.15.
3. through-flow fan blade according to claim 1, it is characterised in that
The chord length of the blade of the through-flow fan blade is L；
On the blade of the through-flow fan blade inner circle summit to the intersection of two sections of circular arcs length be L2,0.1≤L2/L≤0.4.
4. a kind of through-flow fan blade, it is characterised in that
The chord length of the blade of the through-flow fan blade is L；
Length on the blade of the through-flow fan blade at cylindrical summit to the maximum gauge of the blade of the through-flow fan blade is L1,
0.1≤L1/L≤0.4；
The blade of through-flow fan blade thickness at cylindrical summit L1 length is d1, d1/L>0.086.
5. through-flow fan blade according to claim 4, it is characterised in that
The a diameter of D4 of inner circle of the through-flow fan blade,
Second section of circular diameter of the through-flow fan blade is D3, and second section of circle is with the junction of the blade of the through-flow fan blade
The intersection of two sections of circular arcs, 1.05≤D3/D4≤1.15.
6. through-flow fan blade according to claim 4, it is characterised in that
The chord length of the blade of the through-flow fan blade is L；
On the blade of the through-flow fan blade inner circle summit to the intersection of two sections of circular arcs length be L2,0.1≤L2/L≤0.4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310724032.1A CN104728162B (en) | 2013-12-24 | 2013-12-24 | Cross-flow fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310724032.1A CN104728162B (en) | 2013-12-24 | 2013-12-24 | Cross-flow fan blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104728162A CN104728162A (en) | 2015-06-24 |
| CN104728162B true CN104728162B (en) | 2017-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310724032.1A Active CN104728162B (en) | 2013-12-24 | 2013-12-24 | Cross-flow fan blade |
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| Country | Link |
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| CN (1) | CN104728162B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111412179B (en) * | 2019-01-08 | 2024-10-29 | 广东美的制冷设备有限公司 | Cross flow wind wheel and air conditioner |
| JP6852768B1 (en) * | 2019-09-30 | 2021-03-31 | ダイキン工業株式会社 | Cross-flow fan wings, cross-flow fan and air-conditioning indoor unit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202140342U (en) * | 2011-07-26 | 2012-02-08 | 珠海格力电器股份有限公司 | Air conditioner and centrifugal fan blade thereof |
| CN202690524U (en) * | 2012-05-28 | 2013-01-23 | 珠海格力电器股份有限公司 | Cross flow wind wheel and air conditioner comprising same |
| CN203627303U (en) * | 2013-12-24 | 2014-06-04 | 珠海格力电器股份有限公司 | Cross-flow fan blade |
-
2013
- 2013-12-24 CN CN201310724032.1A patent/CN104728162B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202140342U (en) * | 2011-07-26 | 2012-02-08 | 珠海格力电器股份有限公司 | Air conditioner and centrifugal fan blade thereof |
| CN202690524U (en) * | 2012-05-28 | 2013-01-23 | 珠海格力电器股份有限公司 | Cross flow wind wheel and air conditioner comprising same |
| CN203627303U (en) * | 2013-12-24 | 2014-06-04 | 珠海格力电器股份有限公司 | Cross-flow fan blade |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104728162A (en) | 2015-06-24 |
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Effective date of registration: 20230614 Address after: No. 6 Fengxiang Street, Zhengzhou High-tech Industrial Development Zone, Henan Province Patentee after: GREE ELECTRIC APPLIANCE (ZHENGZHOU) Co.,Ltd. Patentee after: GREE ELECTRIC APPLIANCES,Inc.OF ZHUHAI Address before: 519070 No. six Jinji Road West, Zhuhai, Guangdong Patentee before: GREE ELECTRIC APPLIANCES,Inc.OF ZHUHAI |
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